The El Reg Paper Aircraft Released into Space (PARIS) team reckons it's fingered the reason for the Canon A560 power-down, and yes, it's a matter of the batteries, as many of you pointed out.
PARIS: Sponsored by Peer 1 To recap, our main space payload will be packed with goodies including video camera, GPS tracking unit, …

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3D?

We're sorry that some of you just didn't find this vid exciting enough, lacking as it does Avatar-style 3D rendering

So a second camera running the same script will resolve this?

I do hope that you are planning to keep those batteries snuggly warm as they will conk out a lot quicker at 50kF! Personally I would opt for an external battery pack (with 4 times as many in parrallel) wired to the camera!

I still think You'd be better off with an N900

Camera, GPS, accelerometer and development toolkits all rolled into one.

But since it got and continues to get very little coverage by the reg and is never mentioned in comparison with the Jesus phone or Androids that is possibly not surprising btu a little sad for such a fantastic piece of kit.

It's already been used to control and track another 900 attached to a kite and record skateboard tricks to give points showing its versatility to being used for any purpose and though it's slightly chunky I am sure it's lighter than 3 separate units.

Daniel Craig ...

Re: Battery life

45 minutes is shorter than I would expect - have you disabled the screen?

With the A560 I seem to recall there is an additional hack you can do that allows you to switch between video and photo mode using CHDK. Having said that, the videos aren't usually very good so sticking to photos might be the best plan.

If the camera goes up in a polystyrene box with flight computer also encased (I assume the camera doesn't go on the plane...) the temperature should stay quite reasonable inside for the few hours of flight time.